Supporting L2 OvC will reward you with Festival Adena ingame.
Rewards will be instant if the payment will be completed instantly or within a few hours otherwise.
You can pay with Paypal using your Paypal balance, credit card or bank account.
You can pay with Paygol using SMS, call, paysafecard, credit, visa or direct.
You will get 250 Festival Adena per 1 Euro, use paypal whenever possible.
After donating, go to ingame "Donations Manager" NPC to claim your rewards!
This NPC will also have special offers for donators.